Muffler-burner



R. L. STROBEL.

MUFFLER BURNER.

APPLICATION FILED MAY 2. 1919.

Patented May 3, 1921.

3 SHEETS-SHEET I.

VV NTOR ATTORNEY R. L. STROBEL.

MUFFLER BURNER.

APP LICATION FILED MAY 2, 1919.

1 76,979. Pa nted May 3, 1921.

3 SHEETS-SHEET 3.

lwmmumu h WITNESSES A TTORNE Y ,UNl TE-D STATES PATENT D-FFICE.

ROGER I sfibRoBEn 03 Ease HELENA, MONTANA; ASSIGNOIB, TO AMERICANSMELTING AND REFINING COMPANY, A CORPORATION or NEW JERSEY.

Mar anna-BURNER.

I Specification of Letters Patent; V =Pate 1fed May 19 21 Applicationfiled May 2, 1919. Serial no. 294525 2; a

T 0 all whom it may concern i 7 Be it known that I, Roenn L. STR BE acitizen of the United States,-.a-nd resident of East Helena, in thecounty of Lewis and Clark and State of Montana, have invented certainnew and useful Improvements in Muflier-Burners; of which the followingis a specification. v

My invention relates to an ignition de vice for'firing the charge of oreon a moving grate, such as is found in a Dwight-Lloyd sintering machineand constitutes an improvement in the similar device disclosed in thepatent to John F. Austin, No. 1,179,390, granted April 18 1916.

It 1s usual in such the top of the moving charge to be fired and ejectburning fuel into the mulfleinsuch a manner that the down draft of airthrough the charge on such machines will draw the flames down onto thecharge to ignite the same.

Difliculty has been experienced in effecttions and which will effectthis ignition eco- Accord'ngly, another objectof the m..

I tion istoprovide a device of the class described in which theexposedparts of the metal are minimized and protected as far as possiblefrom the action of the heat.

Among the other objects of the'invention is to provide an ignitiondevice formed largely. of separate blocks which can be readily replacedin the supporting frame. which cannot accidentally drop from theconstructions to position an open bottom muflle or hood across,

frame and which will a gas tight fit along the upper sides whilepermitting the expanslon and contraction'incidental to Various otherobjects and advantages of the invention will be in part obvious from aninspectionof the accompanying drawings and in part will be more fullyset forth in the following-particular descriptionof one form ofmechanismembodying my inven tion, and the invention also consists in certain' newand novel features of construction and combination of parts hereinafterset forth andclaimed. Referring to the accompanying draw- 1ngs: y V

Figure 1 is a plan view lookingdow-n upon a preferred embodiment of theinven tion and with oneendb'roken awayto show internal construction 1Fig. 2is a view in side elevation: of the device shown in Fig. 1;

Fig' 3 is a longitudinal taken centrally through the device shown inFigs. 1 and2g H Fig. t-ris an endelevational View at the left handsideor burner end ofthe device shown in the preceding figures;

such structures when in activeuse.

sectional view- Fig. 5 is a transverse sectional view taken;

on theline 5'5 of'Fig. 2-;

Fig. 6 is an end elevational view at the right hand end of thedeviceshown in Figs.

1and3;and v J Figs. 7, 8 and 9 are each perspective views of one elementof the several archsections,

taken in order from left to right. in their corresponding positionsan.the supporting frame; Fig. 7 belng one of the two left hand mediate archsections and Fig. 9,being one of the right hand end arch sections.

The device is made up mainly of a fire. block construction formed ofarch blocks, such as are shown in' Figs. 7 8 and 9 assem, bled in asupporting -metal frame-. The,

to form a skeleton frame. .The'ribs are arch shaped asshownmorefpartieu-larly in Figs. A'to 6 and are each formedof a pair archsections; Fig; 8 being one of theinterof angle irons bent to-form anupstanding" side 12, a top part 13 and an upwardly projecting extension14. These angle irons are each disposed with a flange 15 projectingoutwardly and adjacent flanges about opposite sides of a gusset plate 16and fastened together by means of through bolts 17.

These outwardly extending parts provide, in addition to theirreinforcing functions, ex-

. tensive areas of surface which act as heat ends of the ribs.

distributing areas tendingto distribute the heat which contacts with thelower, exposed The ribs are connected along opposite sides by means ofdeep plates 18 forming side sills fastened to the inner flanges 19 ofthe ribs by means of bolts 20. The ribs are also fastened in positionadj acent the inner portions of the parts 13 by of one pair of ribs tothe next adjacent ex.-

tensions, thus assisting the center sill to hold the upper parts of theribs in place. The open skeleton frame thus formed has the side sillsfixed in position relative to 7 each other and provides a rigid support.for

7' the arched construction of fire resisting marior of the device.

terial hereinafter described. This metallic skeleton frame also providesthe support for a J-shaped bracket 24 at the left or burner end of thedevice. This bracket is utilized for the purpose of supporting aburneror other fuel discharging nozzle common in such devices for thepurpose of discharging combustion-supporting fuel into the inte- Thedevice is provided with a fuel conducting chamber extending lengthwisethereof and which can be divided into an open bottom combustion chamber25 and a closed bottom burner containing compartment 26. The compartment26 is formed in a burner section 27 confined within the outlines of thetwo end arch ribs at the left of the device. These ribs projectdownwardly below the other ribs and are each provided on the innerflanges with L- plates 28 constituting supports for a floor plate 29bridging the space between the opposite sides 12 of these ribs. Thelower ends of these ribs are tied together by a pair of connecting rods30. The fire resisting part of the device containing the chamber 25 andcompartment 26 is formed of three pairs of. arch blocks, each slightlydifferent from the others. The first pair at the left end of the deviceis made up of two of the blocks shown in Fig. 7 and coact to form thesides and top of the burner containing section 27. This compartment, aswill be noted from Fig. 1, is outlined on opposite sides by upstandingwalls 31 and is of progressively greater cross-sectional area from theinlet end 32 toward the opposite or inner end.

through the upper portion of the structure is avoided. The intermediatearchstructure is formed of a pair of the arch blocks 36 shown in Fig. '8and the right end arch structure is similarly formed of a pair of thearch blocks 37 shown in Fig.9.

The upper arched wall constituting the crown of the'assembled archstructure converges downwardly from the flame inlet end 26 of thecombustion chamber 25 toward the opposite end 39. This opposite end issubstantially closed by a depending wall 40 ex-' cept for an outlet 41of small dimension ex tending slightly above the plane of the bottomedge 42 of'the blocks 36 and 37. The

lower edges of the intermediate and right end arch sections'are providedwith broad flat surfaces 43 disposed in a single plane so that the righthand portion of the structure may be positioned relatively close to thegrate on the sintering machine shown in dotted outline in Fig. 3. Thisconstruction provides a relatively wide and long outlet which extendsentirely across, the moving grate of the sintering machine and due'tothe tapered shape of the combustion chamber tends to cause an evendistribution of flame throughout the entire length of the opening. Thebottom of the compartment is closed bymeans of a pair of flat blocks 44positioned on the plate 29 fitted between the two left end ribs andengaging the lower face 45 of the arch blocks at the left end of thedevice.

In operation, the device is hung above the sintering machine as is usualin such operation and With a suitable burner in the burner containingchamber, the burner is started inactive operation, so as to ejectburning fuel into thecombustionrchamber. The fuel contacting with theinclined wall of the chamber is reflected downon top of the movingcharge of ore igniting the charge as is usual in such operations' Bymeans of a device of this character an eflicient combustion is attainedwith a .re-' sulting saving in fuel and but little heat is lost asradiation has beenreduced to a minimum and the jointed structureminimizes leaks. The ignition of the charge as it is passed under themuffler is uniform, taking onto the moving charge.

igsrepre place entirely across the pallet and especially igniting thatpart of the charge which heat within the combustion chamber or to theheat from the fired charge and even what little" metal there is exposedat the lower end of the rib is connected with an extensiveradiating'surface thus insu'ringa longv life to the nietalpart of thestructure; Even should one of the arch sections break for. any reason,the broken parts are retained'in the frames due to the fit between theside sills and these It is practically impossible for the side sillstoburn away and'so lon tion. The upper edge of the side sillswhichconstitute the supports for the blocks are removed from the lower sideof the blocks and are thus removed from the heating action of both thecombustion chamber and from thefired charge on the sintering machine. 7As the blocks can be readily demounted, new sections can be inserted inplace in the frame as desired and even should part of the frame'burn-itis easy to replace the damaged part with but little interruption to thecontinued use of the device.-

claim 1. In adeviceof the class described, a fire resisting, open bottomarch construction having oppositely disposed upstanding walls, each ofsaid walls provided on the outer sides thereof with a' recess formingoverhanging shoulders on opposite-sides of the arch construction, saidshoulders adapted to rest on oppositely disposed sill elements of asupporting frame whereby the arch construction can be suspended inposition.

2. In a device of the class described, a fire resisting, open-bottomarch construction out lining the upper portion of a combustion. chamberwith the rise thereof decreasing from one end toward the opposite endand means for having the construction in position. 1

I 8. In a device of the class described, a fire resisting, open-bottomarch construction outlining the'upper portion of a combustion chamberwith the rise thereof decreasing from'one end toward the opposite endand having a cross" sectional area intermediate the ends greater thanthe cross-sectional area adjacent the ends.

4. In a device of the class described, a fire resisting, open-bottomarch construction outlining the upper portion of a combustion chamberwith the rise thereof decreasing. from one end toward the oppositeendand having." a cross-sectional area intermediate" the ends greater thanthe cross-sectional.

said sections: being exposed and disposed parts willnot fall as the sidesills last the fire blocks will be eld in posiaving thus described myinvention, I

area adjacent the ends afid inea-nsfor mtgf in theconstruotion inosition. v V

5; In ade'viee of'the ol assdescribed,- the; combination of a pluralityof" arch sectlioiis arrangedin pairs interlocking along their" crownsand with one pair interlocking with the next adjacent pairat "theircontiguous ends thereby to=fforni open bottoni arch construction, thelower. edges on each *ofjsubstantially in a single plane whereby theopen-bottom of the arch oons'tniction: may be ositioned olose tothetop'of a. travelingj member; A

6i a devioe of theolass: described,

openebottoniarch construction having a combustion therein exposed" downwardly through'the open-bottom; said ohanr her; having; a' combustiontuel onterin end and said; c'l iainher decreasing" the cross=sec tional'area: from said .fuel entering end toward the opposite end. I

7. In a device 'offt'he class de's'cribegh an open-bottom arch"-construction having a combustion chamber therein exposed down, wardlythrough the open-bottom, said charm ber having acombustion-fuel-entering end: and' said chamber decreasing thecross-sec? tional area from said? fuel enterin end-to'-" ward theopposite" endvand 'a epehding; arched "wall forsubstan tiallyclosingsaid opposite end.

8. An igniting 'devicenin'c'luding an open v end burner containing" secton "closedi along its bottom and a combustion chamber sec tion openingfrom the burner section to receive theflame from the burner therein and:exposed along its bottom to permit'the' flame to ignite substancespositioned below said; combustion chamber, the upper wall of said"combustion chamber being incl-ineddownwardly from the burner sectionendtoward' the opposite end thereof whereby the-flames impinging againstsaid wall are deflected thereby downwardly through the open- 9'. initing devi egprovided" with a longitudinally extending combustion Chainber open along its b tt m side andiprovided at one end with a flamereceiving inlet, said chamber having'a greater rise at the inlet than atthe opposite" end whereby, the clear-f ance f r-the burningisfdecreased'as the gases" are passed through the chambe thus ftellding'to insure a uniform distributio'nof flame. throughout thelengthg'oflfthe open bottom. 10. An i niting" device; rovided with alongitudinally extending combustion chant" b'er open along'its'bott'omsideand. provided at one end 'with a flainereceiving inlet, thecross-sectional area of said chamber pro gressively decreasing from theinlet; end

toward the opposite end whereby tending to insure a uniform distribution'o'f'fflam'e along thelength of-said open bOttQIllf,Said chamber closingtheunderside of the same to form a burner containing compartment at oneendhaving a greater rise at the inlet than at the opposite end wherebythe clearance for the burning is decreased as the gases are passedthrough the chamber thus tending to insure a uniform distribution offlame throughout the length of the open bottom.

11. In a sintering device having a chamber extending lengthwise thereof,one end of said chambercprovided with a bottom for closing the undersideof the same toform a burner containing compartment at one end of saidchamber and the part of the chamber beyond said compartment beingexposed on its underside to permit flames in the chamber topasstherefrom and ignite substances positioned beneath theopen bottompart, theouter end of said compartment providedwith an openingpermitting access to the interior ofthe burnercontaining compartment anda frame engaging the igniting device above the bottom thereof forsupporting the same in the sintering machine.

,12. In a sintering device having a chamber 7 extending lengthwisethereof, one end of said chamber provided with a bottomcfor of saidchamber and the part of the chamber beyond-said compartment beingexposed on :its undersideto permit flames in the chamber to passtherefrom and ignite substances positioned beneath the open bottom part,the outer end of said compartment provided with an openingpermittingaccess to the interior of the burner containing 'compart: mentanda frame engaging the igniting de vice above the bottom thereof forsupporting the same in the sintering machine, said burner containingcompartment increaslng in span from said opening toward theflame inletof the open bottom portion of the chamber.

13. In a sintering device having a chamber extending lengthwise thereof,one end of said chamber provided with. a bottom for,

closing the underside of the same to; form a burner containingcompartment at one end of said chamber and the part of the chamberbeyond said compartmentbeingexposed on its underside to'permitflames inthe ,chamber to pass therefrom and ignite substances positioned beneaththe open bottom part, .the, outer end of said, compartment provided withan opening permitting access to the interior of the'burner containingcompartment andqa frame engaging the igniting device above the bottomthereof for supporting the same in the sinteringfma'chine, saidburnercontaining compartment increasing in" span from said opening toward theflame inlet of the open bottom portion of the chamber, and

said open bottom portion of thechamber de= creaslng in rise from saidflame 'inlet end toward the opposite end.

14. In a device of the class described, the

combination with a hanging frame comprising a plurality oflongitudinally spaced apart arch ribs, and a pair of longitudinallyextending and transversely spaced apart s de sills connecting the innersides of: said ribs, of arch sections fitted between said side sills andprovided withshoulders spacedfrom the bottom of said sections positionedto rest on said sills, said sections coacting to form an open bottomcombustion chamber spaced from said hanging, frame.

15. In a device of the class described, the

combination with a supporting frame in-I eluding ,a pair of invertedU-shaped arch ribs and side sills connecting adjacent sides of eachribabove the lower ends thereof,

arch sections fitted within said ribs, support-1 ed above'the bottomthereof on saidside sills and coacting to form a combustion space closedalong its top and open through its bottom side. I p

' 16. In a device of the class described, the combinationof a supportingframe provided with means for hanging the same in place, a

on said sills and contacting along theircrowns, said sections coactingto form a combustion space and acting to protect the frame from the heatin said space.

18. In a device of the class described, the combination of a supportingframe including longitudinally disposed side sills fixed relative toeach other in spaced apart position, an arch construction fitted betweenand supported by said side sills,said construction forming a combustionchamber provided with an open bottom and said construction closed alongits crown whereby burning;

gases in said chamber are caused to move therefrom downwardly outthrough sald bottom end andout of contact with said sills; f

,19. In a device. of the class described, the

combination with a supporting frame in eluding a pair of invertedU-shaped arch 1 ribs and side vsills connecting adjacent sides of eachrib above the. lower ends thereof, arch sections fitted within saidribs, support ed above the bottom thereof on said side sills andcoacting to form a combustion space closed along its top and floorblocks separate from the arch section fitted between and sup.-

ported by said ribs and closing the bottom of said combustion space;

7 opening.

20. In a device of the class described, the combination of an ignitingdevice formed of fire resisting material and provided with a large heatdischarging areas and spaced from said bottom opening to remove the samefrom flames discharged through said 21. In a deviceof the classdescribed, the combination with a skeleton metal frame, of a blockconstruction fitted within said frame and having a combustion chambertherein with an opening through the bottom thereof, said constructionincluding a plurality of pairs of interlocking blocks of fire resistingmaterial, the blocks of each pair locked in position by said frameagainst an outward separating movement. ,1

22. In a device of the class described, the combination with a skeletonmetal frame, of a block construction fitted within-said frame and havinga combustion chamber therein with an opening through the bottom thereof,said construction including a plurality of pairs of interloclnng blocksof fire resisting material,the blocks of each pair locked in position bysaid frame against an outward separating movement and all parts of theframe which act-to support the blocks forming the opening beingpositioned above the plane of the openmg.

Signed at Helena in the county of Lewis and Clark and State of Montanathis 18th day of April,'A. D. 1919. I

' ROGER L. STROBEL.

